FREE delivery for orders above £450.

Gyp-Level Floor Smoothing Underlayment 20kg Pallet of 54

Code: TF5353

GYP-LEVEL is primarily recommended for application over a pre-existing anhydrite floor screed without the need for applying a barrier seal. This product can also be applied to other commonly encountered surfaces such as flooring grade plywood overlay, existing ceramic & vinyl tiles as well as concrete* & sand/cement screed*, both of which will require pre-sealing before levelling over with GYP-LEVEL.

£612.36 £734.83 Inc VAT

The delivery charge is £42 for orders below £450. Orders above £450 qualify for free delivery. Delivery lead time is 5 working days from the date of the order. We advise that customers wait for their goods to be delivered before arranging work to be undertaken. Building Materials Wholesale may not be held liable for any failure to deliver by any stated time or date or any consequential loss resulting from late delivery. See Full Transport Policy

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PALACE GYP-LEVEL is a super-smooth rapid-curing floor levelling compound incorporating calcium sulphate binders along with a high level of polymer-modification making it the ideal, internal sub-floor smoothing underlayment for direct application onto an existing Anhydrite based floor screed without having to pre-seal the surface. Its fast setting properties cure rapidly give a super smooth even underlayment finish, ready to receive tiling* and decorative resilient floor coverings. It can also be used to level over sealed* concrete & cement-based floor screeds and readily bonds to flooring grade plywood overlay, existing ceramic and suitably prepared vinyl tiled floors in application depths ranging from 2 – 20mm. PALACE GYP-LEVEL is flexible, demonstrates excellent bond strength to existing anhydrite substrates and is suitable for use where underfloor heating systems are in place or are to be installed.

  • Has a working flow time of 30 to 40 minutes at 20’C
  • Can be laid directly to existing anhydrite sub-floors
  • Can be laid from 2mm up to 20mm bed depth in a single pour
  • Suitable for applications where sub-floor heating is to be installed
  • Suitable for pump or trowel application
  • Can receive tiles directly when fixing with PALACE GYP-BOND adhesive

Surface Preparation: PALACE GYP LEVEL is primarily recommended for application over a pre-existing anhydrite floor screed without the need for applying a barrier seal. Any recently laid Anhydrite base will however still require significant preparation to remove all laitance, dust & lose fragments to ensure PALACE GYP-LEVEL will form a stable secure bond with this class of base substrate. Older anhydrite floors must be checked to ensure they are hard, sound and free from grease, dust, floor polish, laitance and loose deleterious materials such as worn surface coatings & plaster. Any adhesive & coatings residues must first be tested to determine if they are “moisture sensitive” and then removed if necessary. Prior to laying PALACE GYP-LEVEL, the base anhydrite screed should be tested to confirm that it has had sufficient time to dry out to reach consistent moisture reading of <75% R.H. (< 0.5% residual moisture content) – tested as per BS 8203:2017 – Annex B. Where it is not known whether an effective structural DPM is in place, or where the moisture test results show values in excess of 75% R.H (or > 0.5% residual moisture content), then a liquid damp-proof membrane such as moisture suppressant PALACE 1-COAT DPM should be applied onto the prepared concrete sub-base, before it is over-laid with PALACE GYP LEVEL levelling compound. Natural room temperature drying times of this class of screed can be at a rate of 1mm screed depth per day (2mm per day is > 40mm deep), therefore the use of PALACE 1-COAT DPM and where this cannot be achieved within a manageable period of time, the application of PALACE 1- COAT DPM is recommended. Although PALACE GYP-LEVEL will bond readily to most solid sub-floors, the application of a primer on highly porous surfaces will assist with maximising flow time, adhesion strength & reduce pin-holing. PALACE MULTI-PRIME diluted 1 part to 3 parts water can be used for this purpose and very porous substrates may need a second coat diluted 1-part water to 1-part primer before applying PALACE GYP-LEVEL floor levelling underlayment.

Specific Substrate Preparation: PALACE GYP-LEVEL is primarily specified for use on existing anhydrite (calcium sulphate) based floor-screeds. Its’ application across other substrates is limited particularly where cement-based substrates are concerned as it is still possible that an adverse reaction can occur unless the cement screed or concrete base is sealed with two coats of PALACE MULTI-PRIME (see tech datasheet) to form a barrier & avoid any adverse interaction between this substrate and the PALACE GYP-LEVEL being laid over it.

Tile backer boards: Confirm the composition of the Tile Backer board before applying PALACE GYPLEVEL, like those based on cement or a cement slurry top-coat will require pre-sealing as if they were a cement-based screed or concrete (see previous). Boards that are calcium sulphate based can be over-laid directly with PALACE GYP-LEVEL.

Plywood Overlay: Check that plywood overlay is flooring grade compliant to EN 314:2 Class 3 Exterior before applying PALACE GYP-LEVEL and ensure that new or existing boards are preconditioned to the environment in which they will be used. Plywood sheets must be a thickness of 15-18mm minimum & screwed to substrate at 150mm centres. Ensure there is sufficient ventilation beneath substrate and that the plywood has been fitted competently and will take the weight of the leveller, adhesive and the final anticipated in-use loading without any risk of deflection. It should be dry and free of any contaminants, loose dust or dirt. Existing plywood showing signs of wear or abrasion will require priming with PALACE MULTI-PRIME diluted 3-parts water, to 1-part PALACE MULTI-PRIME. New, uncontaminated plywood does not require priming.

Floors coated with a Surface Damp Proof Membrane: Damp-Proof Membrane coatings such as PALACE 1-COAT DPM should be treated as non-absorbent substrates and applications of PALACE GYP-LEVEL should be completed within 12 hours of the DPM being first applied (Consult PALACE 1-COAT DPM technical datasheet). Sand blinding the freshly applied DPM will assist with improving the bond to over-laid screeds.

Underfloor Heating Systems: Heating wires must be securely fixed to a sound consistent substrate such as cement backer board. PALACE GYP-LEVEL should then be applied at a thickness that allows for clearance above the elements of no less than 5mm depth of levelling compound to ensure a smooth even finish will be attained prior to laying the finished decorative or resilient surface. Always allow at least three weeks before the heating elements are switched on at the lowest setting and then only raise the temperature progressively by 2’C per day over the following week.

Mixing: PALACE GYP-LEVEL should be added to clean water in a clean container and mixed thoroughly with a power whisk fitted to an electric drill to give a smooth, lump-free, ¬flowable & pourable levelling compound which should be applied to the intended area without delay. The recommended mixing proportions are approximately 4.0 litres of water per 20kg sack. Exceeding this recommendation will result in excess bleed and a weaker mix. The material should be mixed for a minimum of 2 minutes after the last of the powder is added ensuring the mixing head is below the surface to minimise air entrapment. Allow the mix to stand for 1 minute after which time the free-flowing screed will be ready for application directly onto the prepared substrate.

Application: Pour the freshly mixed levelling compound onto the prepared surface and use a straight-edged steel float to ensure the compound is evenly spread into all areas and corners. PALACE GYP-LEVEL will readily flow across a flat surface and smooth out trowel marks for about 20 to 30 minutes before it begins to firm up. Do not allow the mixed material to stand for a prolonged period in the bucket as this will shorten its’ flow & open time. The use of a spiked roller will assist in removing air bubbles and achieving a consistently smooth surface finish, particularly between adjacent mixes of product. Only spike roll whilst the product is still in its fluid state, usually for about 10 minutes after initial application. The maximum total application thickness for this product is up to a depth of 20mm. In ideal conditions (20’C), it will remain flowable for 20 minutes and then. after about 3 hours, the laid screed will have reached the final set sufficient to take light foot traffic. All tools & mixing equipment should be washed immediately after use with clean running water before the material reaches its’ initial setting time.

Curing & Drying: PALACE GYP-LEVEL when applied at 20’C & 65% RH under ideal site conditions will allow for a working time of up to 20 minutes and then reach the initial set after 1 hour. Under the above conditions, it will rapidly cure to allow light foot traffic after 3 hours and will be ready to receive tiles after 4 hours and soft flooring after 24 hours.

Coverage: PALACE GYP-LEVEL when applied over a smooth even non-absorbent floor at an average 3mm depth will cover at a rate of one 20kg bag per 5.0M2. Adequate ventilation is essential during the drying process and any draughts or exposure to excessive heat sources must be eliminated to ensure consistent drying.

Precautions: PALACE GYP-LEVEL should not be applied to freshly laid concrete or cement-sand screeds, nor should it be used in areas where the finished floor is likely to be frequently wet or exposed to intermittent levels of dampness such as in & around pools showers or bathrooms. Areas, where sub-floor heating is to be installed, should only allow the heating to be activated gradually at 1’C per day starting from 3 weeks after initial laying. Do not apply this product when ambient temperatures are at or below 10’C or above 30’C or if they are likely to remain below 10’C for the first 24 hours. PALACE GYP-LEVEL is not for use as a final wearing surface and should never be exposed to an external environment.

Storage & Packaging: PALACE GYP-LEVEL is supplied in 20kg moisture resistant bags and should have a storage life of not less than 12 months if stored in dry, un-opened and frost-free conditions.


Product Documents

Technical Datasheet


Material Safety Datasheet


Declaration of Performance


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