Home /OLFA /Blades /OLFA LWB-3B 18mm Serrated Insulation Blade, 3 Pack

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Blades

OLFA LWB-3B 18mm Serrated Insulation Blade, 3 Pack

Name: OLFA LWB-3B 18mm Serrated Insulation Blade, 3 Pack
Brand: OLFA
SKU: CUT-BLA-580
Price: 7.99 USD
Availability: InStock
Rating: 4.3 (6 reviews)

4.3 (6)

$7.99

Buy the OLFA LWB-3B 18mm serrated insulation blade 3 pack — serrated edge for fiberglass and porous insulation — for $7.99 with coupon BENCH10 online.

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Pair withOLFA ML 18mm Metal Handle Utility Knife$7.99

Categories : Blades

SKU : CUT-BLA-580

Description

OLFA LWB-3B Insulation Blades — $7.99 for 3

The OLFA LWB-3B 18mm Serrated Insulation Blade, 3 Pack cuts thick, porous insulation materials that defeat standard blades. The precision-honed serrated edge glides through fiberglass and similar stock while the long solid design extends for deep, accurate cuts. Order online now for just $7.99 and apply coupon BENCH10 for an extra 10% off.

Specifications

Brand: OLFA
Model: LWB-3B
Blade Size: 18mm / heavy-duty
Blade Type: Solid, serrated edge
Material: Premium Japanese tool steel
Pack Size: 3 blades

What are OLFA LWB-3B insulation blades used for?

Serrated edges grip and slice porous and fibrous materials — fiberglass insulation, thick foam, and similar stock — where smooth blades snag and tear. The extendable solid design reaches full-depth cuts.

Compatibility

LWB-3B blades fit most 18mm snap knives and OLFA heavy-duty 18mm handles, including the L-1.

How to Cut Insulation with LWB-3B

Extend the blade to full cut depth, score along a straightedge with firm strokes to let the serrations bite, and complete the cut in one controlled pass.

Price & Deal Value

$7.99 for a 3-pack is the affordable way to keep a dedicated insulation blade on every knife. Coupon BENCH10 saves 10% more; orders over $45.00 ship free.

Best Use Cases

Fiberglass and batt insulation cutting
Thick or porous materials
Construction and MRO insulation installs

Features

Serrated solid edge cuts fiberglass and porous insulation cleanly where smooth blades snag — for only $7.99
Premium Japanese steel construction delivers lasting sharpness across all 3 blades
Extends for deep cuts in thick insulation, fitting most 18mm snap knives
Model: LWB-3B
Material: Premium Japanese tool steel
Pack Size: 3 blades
Blade Size: 18mm
Blade Type: Solid, serrated edge
Product Type: 18mm Serrated Solid Insulation Blade, 3 Pack
Compatibility: Most 18mm snap knives, including OLFA L-1
Seller: Cutter's Bench
MPN: LWB-3B

Product Details

Insulation Work Made Easy: OLFA LWB-3B

Standard smooth blades tear fiberglass. The OLFA LWB-3B's serrated edge bites through porous insulation for clean, accurate cuts, and its solid body extends for full-depth passes.

Comparison

Use smooth L-SOL solid blades for dense foam; use serrated LWB-3B for fiberglass and fibrous stock. Both fit most 18mm snap knives.

Price Value

$7.99 for three premium Japanese steel blades plus coupon BENCH10 (10% off) and free shipping over $45.00 — buy online now.

Frequently Asked Questions

What are OLFA LWB-3B insulation blades used for?

Cutting thick or porous materials like fiberglass insulation where a serrated edge outperforms smooth blades.

Do OLFA LWB-3B blades fit an 18mm utility knife?

Yes, they fit most 18mm snap knives including OLFA heavy-duty handles like the L-1.

How much does the LWB-3B 3 pack cost?

$7.99 at Cutter's Bench, with coupon BENCH10 taking an additional 10% off.

Are there deals on OLFA insulation blades?

This $7.99 price, coupon BENCH10, and free shipping over $45.00 are the current offers.

How do I cut insulation with the LWB-3B?

Extend the serrated blade to full depth, score along a straightedge with firm strokes, and finish in one controlled pass.

Customer Reviews

6

5.0

u***c

Verified

Finally, no more shredding fiberglass

Regular blades just drag and tear fiberglass batts. The serrated edge on these grabs and slices cleanly — it's a completely different experience. Three pack is perfect backup supply.

4.0

n*s

Verified

Does the job right

Big improvement over plain blades for porous insulation. Cuts clean with less fuzz and fiber mess.

5.0

z***e

Verified

Serration is the secret

I insulate houses for a living and these are the only blades I'll use on fiberglass now. They saw through the material instead of pushing it around. Less itch, less waste, faster cuts. Wish I'd found them years ago.

3.0

r*****n

Works, but wears

Great on fiberglass batts initially. They dull faster than I'd like on dense mineral wool. For the price, still worth it.

5.0

s*g

Verified

Perfect

Clean cuts through insulation every time.

4.0

e***i

Verified

Good value for the money

At 7.99 for three you can't go wrong. Serrated edge makes quick work of batt insulation and foam too. I use them in my 18mm OLFA knife and they fit perfectly.