37.5mm Unilin Safe-R SR/TB (25mm Phenolic Core and 12.5mm Plasterboard) - Dot and Dab (pack of 12)
Guide Price
37.5mm Unilin Safe-R SR/TB (25mm Phenolic Core and 12.5mm Plasterboard) - Dot and Dab (pack of 12)
Guide Price: £712.18 (£854.62 inc VAT)
Price per m2: £20.61/m2 (£24.73 inc VAT)
- Product Code: A1-4876
- Delivery Time: 2 - 3 working days
- Brand: Unilin (prev. Xtratherm) (Tech. support: 03712221055)
- Model: 2400x1200 - 34.56m2
Our ratings on 20-05-2026:
4.8 out of 5
37.5mm Unilin Safe-R SR/TB (25mm Phenolic Core + 12.5mm Plasterboard) - Dot & Dab (pack of 12)
Length: 2400mm
Width: 1200mm
Height: 37.5mm
Pack Quantity: 12
Board Coverage: 2.88m2
Pack Coverage: 34.56m2
Thermal Conductivity: 0.023W/mK
R-Value: 1.15m2K/W
37.5mm Unilin Safe-R SR/TB is a composite insulated panel of of 25mm Unilin Phenolic core with a glass tissue facing, bonded to a 12.5mm tapered edge plasterboard for internal applications. Unilin Safe-R SR/TB composite insulation board is fixed with dot & dab adhesive bonding. It is designed to provide high levels of thermal insulation and dry lining in one operation for new builds and renovation. Using this board can help to reduce energy costs and improved living conditions.
Note: This composite plasterboard was formerly known as 37.5mm Xtratherm Safe-R Thermal Liner SR/TB

CHARACTERISTICS
- Superior performance phenolic foam,
- Effective thermal and fire performance,
- Can be readily cut using a sharp knife or fine toothed saw,
- Low smoke obscuration,
- Low risk fire rating - Class 0,
- HCFC/CFC Free,
- Zero ODP,
- Rot proof and will remain effective for the life span of the building,
- Reaction to fire: Euroclass B-s1, d0
APPLICATION
- Internal wall drylining for new build or refurbishment
INSTALLATION
- Align the SR/TB board squarely on wall.
- Allow a 15mm expansion joint at the top and bottom of the panel, and fill with foam filler.
- Mark the position of the panel on the wall. Apply adhesive dabs to the wall in accordance with BS8212:1986 & BS 800: Part 8: 1994.
- Vertical dabs @ 300mm centres 25mm in from edge. Dabs 50-75mm wide approx 25mm deep to allow for tamping. Total contact with boards area should be 20%.
- Lift the SR/TB board into position using wedges on the floor.
- Apply pressure to the board to level and embed in the adhesive.
- Insulation should be cut back to accommodate an adjoining panel at external corners.
- When the adhesive has dried, 3 fireproof mechanical fixings should be fixed through the centre of the board.
CERTIFICATION

Note: Bonding of the Unilin Insulation board with other materials may be made by Unilin or a different fabricator.
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