Centrecoat MMA Joint Seal

SKU id23555 Part A: UN1866 (Class: 3, Pk Grp: II), Part B: UN3106 (Class: 5.2)
A two pack, pourable, flexibilised methacrylate sealant suitable for direct pouring into horizontal floor joints.
Available in 1 and 2 Litres in Light Grey. Tintable to RAL numbers upon request.
£26.72 (£32.06 Inc VAT)
£26.72 (£32.06 Inc VAT)

Product Description

Centrecoat MMA Joint Seal is a light grey, two pack, pourable, flexibilised methacrylate sealant suitable for direct pouring into horizontal floor joints in warehouses and factories.

Best Uses

Centrecoat MMA Joint Seal is formulated to seal floor joints in food factories and warehouses where heavy vehicular trafficking occurs. Centrecoat MMA Joint Seal is hard and tough enough to protect arris edges from heavy wheel loading, but possesses sufficient flexibility to accommodate a degree of movement (10% of the joint width). Centrecoat MMA Joint Seal is particularly suitable for filling saw cut joints in long strip floor construction.

  • Excellent adhesion to concrete
  • Tough and resilient
  • Suitable for wide joints
  • Highly resistant to water
  • Easy to apply
  • Fast curing, even at very low temperatures
  • Hygienic and easily cleanable

Joint Design
When using Centrecoat MMA Joint Seal, the joints shall be designed to ensure that concrete movement due to shrinkage and temperature fluctuations does not  exceed 10% of the joint width. For joints up to 12mm wide, the depth of sealant should be equal to the width. For joints over 12mm wide the depth of the sealant should not exceed 20mm. Joints over 25mm wide are permissible with Centrecoat MMA Joint Seal.


New concrete floors shall be a minimum of 21 days old. Joint surfaces shall be sound, clean and free from laitance, dust and other contaminants. Joint arrises are best prepared by grinding or power wire brushing, ensuring that all spoil and residual dust is removed by blowing with dry, oil free, compressed air. For best results, prime the joint edges using Centrecoat MMA Joint Seal and allow to cure for a minimum of 45 minutes. Debonding tape should be used in the base of the joints otherwise a polyethylene foam backing strip should be inserted to the appropriate depth.

Centrecoat MMA Joint Seal is supplied as a two pack material consisting of the BASE component, and the CATALYST component. Pour the entire contents of the CATALYST container into that of the BASE component, and thoroughly mix until a uniform consistency has been achieved.

The mixed material may be poured directly into the prepared joints to level. Alternatively Centrecoat MMA Joint Seal may be poured into empty cartridge tubes and gunned into the joints using a sealant gun. It may be necessary to top up to level after a few minutes when the sealant has settled into irregularities.

Clean equipment with Centrecoat MMA Tool Cleaner immediately after use.

Centrecoat MMA Joint Seal will have cured sufficiently after 1 hours cure @ 20°C to allow full trafficking.  Full chemical resistance will be achieved following 24 hours cure @20°C.  At lower temperatures cure times will be increased.  Pre-accelerated grades of the material can be provided for sub-zero application.

Recommended Products To Use

Centrecoat MMA Tool Cleaner

Centrecoat MMA Tool Cleaner

An equipment cleaner suitable for the removal of uncured methyl methacrylate resins.

£40.08 (£48.10 Inc VAT)