GRP Decking Strip Fixing Guide

 

 

 

 

 

 

The Ultimate GRP Decking Strip Fixing Guide

 
Drill It. Bond It. Fix It Right—Every Time.

A No-Nonsense Approach to Drilling & Bonding for Durability That Lasts

Whether you’re laying anti-slip strips on outdoor timber steps or retrofitting industrial platforms, this guide gives you everything you need—without the fluff.

 

🔩 Precision Drilling Without the Drama

To get those GRP strips secured like a pro, you’ll want drill bits that slice clean and stay sharp. Here’s the shortlist that delivers:

  • 🎯 HSS Bits – For everyday drilling with crisp, reliable holes
  • 🪓 Carbide-Tipped Bits – When longevity and neatness are key
  • 💎 Diamond-Coated Bits – Ideal for enlarging pre-drilled holes with zero chatter

Tip: Go for a 6mm bit—the sweet spot for No. 8 screws that don’t wobble or crack the GRP.

 

🧠 Smart Drilling Tips
  • Tape the surface to guard the gelcoat and avoid wandering
  • Drill fast with light pressure—it cuts clean and avoids burns
  • Support the underside with timber to dodge blowout
  • Suit up with dust protection—GRP particles aren’t skin-friendly
🔗 Bond + Bolt = Bulletproof Fixing

Screws alone? They’ll hold. But if you’re after whisper-quiet steps and weather-proof certainty, pair them with the right adhesive.

💪 Why Use Both?

  • Double Strength – Screws hold; adhesive seals
  • Noise Control – No hollow thump when walked on
  • Waterproofing – Blocks moisture from creeping under
  • Forgiving Fit – Adhesive levels uneven surfaces for full contact

🧰 When Screws Alone Are Enough

  • Flat timber surfaces in dry, low-traffic spots
  • Temporary installations
  • Fast-fit jobs with zero margin for curing time   
🧪 Fixing Instructions That Actually Work

✅ Drill holes (pilot first) with a quality HSS bit

✅ Run a 6mm adhesive bead about 15mm from each edge

✅ Position screws 50mm from each end and every 250–300mm along the strip

✅ Press firmly and let the adhesive cure (usually 24–48 hours)

 
🔬 Fixing Guidelines from the Field

Our preferred adhesive: Grab Adhesive Solvent Free

It bonds like a champ to:

  • Wood, concrete, brick, stone
  • Ceramic, plasterboard, plastics, steel

❌ Not suitable for: polystyrene, mirrors, polypropylene, or acrylic

 📦 One 290ml tube covers approx. 8–10 decking strips (1000mm each)

 

📦 Adhesive Line-up

Product

Name

Best

Use Case

Clear?

Size

 

GRPA1000CL Clear Sealant

GRP strips, nosing, treads, sheets

✅

290ml

 

NovaSeal SignFix 2 Transparent

Hygiene areas, backlit signs, damp surfaces

✅

290ml

 

Both offer superb flexibility, weather resistance, and seamless bonding—indoors or out.

📦 Bulk Order

Need large quantities? Let’s make it easy—call us Multi Supplies 4U

on 01282 930195 and we’ll sort you out.